U 10.0.0.10:6060 -> 10.0.0.110:9265
SIP/2.0 407 Proxy Authentication Required.
Via: SIP/2.0/UDP 10.0.0.110:9265;branch=z9hG4bK-d87543-760361986-1--d87543-;rpo$
From: <sip:1000@10.0.0.10>;tag=0b211134.
To: <sip:12016180234@10.0.0.10>;tag=as69fa4f54.
Call-ID: d378111b4f3d0010.
CSeq: 2 INVITE.
User-Agent: Asterisk PBX.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY.
Supported: replaces.
Proxy-Authenticate: Digest algorithm=MD5, realm="asterisk", nonce="6f30bf44".
Content-Length: 0.